Metal-distillation furnace.



I131 %AT% PAEN FFIQE.

EDWARD E. CHERRY, OF TRENTON, NEW JERSEY, ASSIGNOR OF ONE-HALF 1'0 MAX MOVSHOVITZ, 0F TRENTON, NEW JERSEY.

METAL-DISTILLAIION FURNACE.

Specification of Letters Patent. Patented June 26, 1917.

Applieation filed. March 30, 1917. SeriaI No. 158,617.

To all whom it may concern:

Be it known that I, EDWARD E. CHERRY, a citizen of the United States, residing in Trenton, New Jersey, have invented certain Improvements in Metal-Distillation Furnaces, of which the following is a specification.

My invention relates to that type of furnace in which metals are purified by means of distillation, the object of my invention being to so construct such a furnace as to provide for a quick and uniform heating of the retort with a minimum consumption of fuel.

This object I attain in the manner hereinafter set forth, reference being had to the accompanying drawing, in which Figure 1 is a vertical sectional View of a furnace constructed in accordance with my invention, and

Fig. 2 is a transverse section on the line 2-2, Fig. 1.

In the drawing I have illustrated my furnace as being built up of brickwork but I do not limit myself to this construction, as other material could be used.

The furnace consists primarily of a combustion chamber 1, grate 3, and ash pit 4, all inclosed within front, rear and side walls.

Mounted within the upper portion of the.

combustion chamber is an inclined retort 5, the mouth of this retort passing through and being supported by the front wall of the furnace and being provided with a condenser 6 and the butt of the retort resting upon a platform 7 which projects inwardly from the rear wall of the furnace, the retort being mounted in such a position that free passage for the products of combustion is provided between its sides and the side walls of the furnace and between its butt and the rear wall of the furnace.

Near the top of each side wall of the furnace and within the same is formed a flue 8, the forward ends of which are in communication with the combustion chamber through openings 9 and the rear ends of which are united by means of a transverse flue 10 in the upperportion of the rear wall of the furnace. Formed in the rear wall is a vertical flue 11 which connects the transverse fine 10 with an exhaust flue 12.

Theforward end of this exhaust flue 12 opens into the ash pit 4, through which the flue may be cleaned, although normally com munication between the two is cut off by means of a door 13. The rear end of the flue 12 enters a stack (not shown) by means of which draft is maintained within the furnace.

After the fire has been lighted the products of combustion pass upwardly around the sides and over the butt of the retort 5, as shown, by thearrows in. Fig.1, and escape through the openings 9 into the side fines 8,

from which'they are drawn through the flues l0 and 11 into the fine 12 and thence to the stack.

By placing the draft openings 9 close to the front wall of the furnace a quicker and more uniform heating of the retort is effected than when the draft openings are at the rear of the furnace, and I further increase the speed of heating by inclining the roof 14 of the furnace at an angle substantially in accordance with the inclination of the retort. This inclined roof not only tends to direct the products of combustion to the draft openings 9 but also throws said products of combustion down upon the upper surface of the retort. This effect will be increased by inclining the upper portion of the rear wall of the furnace toward the front, whereby such of the products of combustion as are traveling upward adjacent said rear wall are diverted from their upward path as they pass the butt of the retort and given a diagonal direction before striking the roof of the furnace.

While I might have the side flues 8 in direct communication with the stack I prefer the construction which I have shown, for the reason that the passage of the products of combustion down through the flue 11 serves to keep the rear wall of the furnace at a higher temperature than it otherwise would be, thereby increasing the temperature maintained within the furnace.

I claim:

1. A distillation furnace having front, rear and side walls, and an exhaust flue formed within the upper portion of one of said side walls, said exhaust flue being in communication with the combustion chamber of the furnace at a point adjacent to the front wall thereof.

2. A distillation furnace having front, rear and side walls, and exhaust flues formed within the upper portions of said side walls,

each of said. exhaust fines being in eommunt cation with the combustion chamber of the furnace at a point adjacent to the front wall thereof.

3. A distillation furnace having front, rear and side walls, and exhaust flues formed within the upper portions of said side walls, said exhaust flues being in communication with the combustion chamber of the furnace at their forward ends and being in communication at their rearward ends with each other and with a descending flue formed within'the rear wall of the furnace.

4. A distillation furnace having front, rear and side walls, an inclined retort mounted within the combustion chamber of the furnace, a roof on said combustion chamber, said roof being inclined substantially in accordance with the inclination of the retort, and exhaust flues in the side walls, each of said fines being in communication with the combustion chamber at a point adjacent the front wall and imme- "the retort, the upper portion of the rear wall being inclined forwardly, and exhaust fiues in the side walls, each of said fines being in communication with the combustion chamber at a point adjacent the front wall and immediately below the roof.

In testimony whereof, I have signed my name to this specification;

EDWVARDE. CHERRY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

